@article{Christopoulou:2009Gr,
  author = "Christopoulou, Eleftheria-Panagiota  and  Xilouris, E M  and  Boumis, P  and  Papadakis, I. E.",
  title = "{Multi band optical micro variability of BL Lac objects}",
  doi = "10.22323/1.063.0029",
  journal = "PoS",
  year = 2009,
  volume = "BLAZARS2008",
  pages = "029"
}